Installation Guide (First Release 1000 Series) Manual

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VT7600 Series

Programmable & Non-Programmable Thermostats

For Commercial HVAC Applications

(Issue Date June 17, 2008 – 028-0132 R8

Product overview

The VT7600 PI thermostat family is specifically designed for single stage

and multi-stage control of heating/cooling equipment such as rooftop and

self-contained units. The product features an intuitive, menu-driven, back-lit

LCD display which walks users through the programming steps, making the

process extremely simple. Accurate temperature control is achieved due to

the product’s PI time proportional control algorithm, which virtually eliminates

temperature offset associated with traditional, differential-based thermostats.

All models contain two digital inputs, which can be set by the user to monitor

filter status, activate a remote temporary occupancy switch, and/or used as

a general purpose service indicator. In addition, depending on the model, up

to three remote sensor inputs are available. All models contain a SPST

auxiliary switch, which can be used to control lighting or disable the

economizer function and a discharge air sensor input. For more advanced

applications, an economizer control logic has been integrated onto the

thermostat for use with proportional damper economizer actuators.

The additional following documentation is available on www.viconics.com

• Information on the LON models (VT76xxX1000E), is available on document ITG-VT7600-LON-Exx

• Information on the BACnet models (VT76xxX1000B), is available on document ITG-VT7600-BAC-Exx

• Information on the Wireless models (VT76xx0X1000W), is available on documents: ITG-VWG-40-BAC-

Exx and LIT-VWG-40-SETUP-Exx

Models available

Application 1 Heat / 1 Cool 2 Heat / 2 Cool

2 Heat / 2 Cool

with economizer

3 Heat / 2 Cool

heat pump

Model (programmable) VT7652A1000 VT7652B1000 VT7656B1000 VT7652H1000

Model (non-programmable) VT7600A1000 VT7600B1000 VT7605B1000 VT7600H1000

Features and benefits

Features Benefits

• PI time

ortionin

orithm ⇒

Increased comfort

accurac

and ener

savin

• 2 di

ital in

uts ⇒

Adds functionalit

• Smart fan ⇒

Saves ener

durin

ht mode

• Uni

ue confi

uration ke

⇒

Minimizes

arameter tam

erin

• Lockable ke

ad ⇒

Tam

roof

no need for thermostat

uards

• Freeze

rotection ⇒

Prevents costl

freeze dama

• EEPROM memor

⇒

No loss of

ram

• 6 hour reserve time for clock ⇒

No need to re

ram da

/time after

ower shorta

• Remote room and outdoor tem

erature senso

⇒

Increase flexibilit

and functionalit

• Auxiliar

out

ut ⇒

Can be used for li

htin

and/or economizer override

• Discharge air sensor ⇒ Can be used to monitor unit efficiency

• Intuitive, menu-driven programming (7 day, 2/4 events -

on programmable models only)

⇒ Can be used for all types of establishments

• Economizer output (0-10 V d.c.) (on economizer models

only)

⇒ Excellent retrofit opportunities

• Low/Hi

h balance

oint

(

on heat

models onl

⇒

Protect and o

timize s

stems

erformances

• 3 Heat/2 Cool (on heat pump models only) ⇒ Support single and two stages heat pump with one

auxiliary heat stage

028-0132R8_LIT-VT7600-E08.doc

www.viconics.com / sales@viconics.com

Fig.1

VT7600 Series

Summary of content (24 pages)

PAGE 1
VT7600 Series Programmable & Non-Programmable Thermostats For Commercial HVAC Applications (Issue Date June 17, 2008 – 028-0132 R8 Product overview The VT7600 PI thermostat family is specifically designed for single stage and multi-stage control of heating/cooling equipment such as rooftop and self-contained units. The product features an intuitive, menu-driven, back-lit LCD display which walks users through the programming steps, making the process extremely simple.
PAGE 2
Theory of operation The VT7600 uses a Viconics proprietary adaptive logic algorithm to control the space temperature. This algorithm controls the heating / air conditioning system to minimize overshoot while still providing comfort. It provides exceptional accuracy due to its unique PI time proportioning control algorithm, which virtually eliminates temperature offset associated with traditional, differential-based on/off thermostats. Fig.2 - On/Off mechanical control vs PI electronic control.
PAGE 3
Installation • • • • Remove security screw on the bottom of thermostat cover. Open up by pulling on the bottom side of thermostat. Remove Assembly and remove wiring terminals from sticker. (Fig. 3) Please note the FCC ID and IC label installed in the cover upon removal of cover for the wireless products. A) 12345- Location: Should not be installed on an outside wall. Must be installed away from any heat source. Should not be installed near an air discharge grill.
PAGE 4
Wiring Terminal identification Multistage Part Number Programmable 1H / 1C VT7656B VT7605B VT7652B VT7600B VT7652A Yes No Yes No Yes Heat Pump VT7600A Part Number No Top left terminal block Programmable VT7652H VT7600H Yes No Top left terminal block Y2 X X X X Y2 X X Y1 X X X X X X Y1 X X G X X X X X X G X X RC X X X X X X RC X X C X X X X X X C X X Top right terminal block Top right terminal block RH X X X X X X RH X X W1 X
PAGE 5
Detailed wiring diagrams for selected models Thermostat Terminals -VT7656B1000 VT7656B1000 2 Heat / 2 Cool / Economizer / Programmable Y2 Y1 G C RC RH W1 W2 EC AU DI1 DI2 RS Y1 Cool Stage 2 G RC C OS MS Digital Input #1 Jumper J1 See note 1 (previous page) Y2 Scom Digital Input #2 RH W1 W2 Heat Stage 1 Fan Cool Stage 1 AU EC DI1 DI2 0-10 Vdc Heat Stage 2 24V Com RS Scom OS MS Remote Room Sensor Remote Mixed Air Sensor Auxiliary Output Remote Outdoor Sensor 24 Vac Th
PAGE 6
Remote sensor accessories Model no. S3010W1000 S3020W1000 S2020E1000 S2060A1000 S2000D1000 Description Wall mounted temperature sensor Wall mounted temperature sensor with override button and occupancy status LED Outdoor temperature sensor Averaging temperature sensor Duct mounted temperature sensor Remote mount temperature sensors use 10K NTC thermistors.
PAGE 7
Temperature vs resistance chart for 10 Kohm NTC thermistor (R25°C = 10KΩ±3% - B25/85°C = 3975K±1.5%) ºC ºF ºF Kohm ºC ºF 32 32.1910 ºF 20 68 12.4601 Kohm ºF Kohm 40 104 ºC 5.3467 S3010W1000 remote wall mounted temperature sensor, dip switch location Kohm ºC Kohm ºC -40 -40 324.3197 -20 -4 94.5149 0 -39 -38 303.6427 -19 -2 89.2521 1 34 30.6120 21 70 11.9177 41 106 5.1373 -38 -36 284.4189 -18 0 84.3147 2 36 29.1197 22 72 11.4018 42 108 4.9373 -37 -35 266.
PAGE 8
User menu flow chart: NOTE: Prompts may not all be present depending on model selected MENU If status is: Unoccupied Override schd Y/N If status is: Temporary Occupied Time, Temperat set? Y/N Sys mode set? Y/N off emergenc heat cool auto Fan mode set? Y/N Cancel ovrd Y/N Appears on stand-alone models only Clock set? Y/N Schedule set? Y/N On Smart Auto Resume Occ Hold Uno Hold Time set? Y/N Cooling set? Y/N Temperature Heating set? Y/N Temperature Exit? Y/N Unocc CL set? Y/N Temperatu
PAGE 9
Programming and status display instructions 1. Status display The thermostat features a two-line, eight-character display. There is a low level back-light level that is always active and can only be seen at night. When left unattended, the thermostat has an auto scrolling display that shows the actual status of the system. Each item is scrolled one by one with the back lighting off. Pressing any key will cause the back light to come on. Sequence of auto-scroll status display: Room temperature RoomTemp x.
PAGE 10
2. User programming instructions menu The VT7600 series of thermostat feature an intuitive, menu-driven, back-lit LCD display that walks users through the programming steps, making the programming process extremely simple. This menu is typically accessed by the user to set the parameters such as temperature and time events, system mode, fan mode, etc. It is possible to bring up the user menu at any time by depressing the MENU key.
PAGE 11
A) Override an unoccupied period Override schd Y/N This menu will appear only when the thermostat is in unoccupied mode. The unoccupied mode is enabled either by the internal timer scheduling or by a remote NSB contact via DI1 or DI2. If DI1 or DI2 is configured to operate as a remote temporary override contact, this menu will be disabled. Answering yes to this prompt will cause the thermostat to go into occupied mode for an amount of time equal to the parameter “TOccTime” (1 to 12 hours).
PAGE 12
E) Fan mode setting Fan mode set Y/N This section of the menu is permits the setting of the fan mode operation. Use ▲▼ to set value, Yes key to confirm Fan mode On On fan mode Fan is on continuously, even when system mode is OFF. Fan mode Auto Automatic fan mode Fan cycles on a call for heating or cooling for both occupied & unoccupied periods. Fan mode Smart Smart fan mode During occupied periods, fan is on continuously. In unoccupied mode, fan cycles on a call for heating or cooling.
PAGE 13
G) Schedule set (4 events) Schedule set Y/N This section of the menu permits the user to set the whether 2 or 4 events is needed. Each day can be tailored to specific schedules if needed. • 4 events can be programmed per day. • Occupied & Unoccupied periods can be set for each day. • Programming the 3 rd. & 4 th. events to the same time will cancel the last period.
PAGE 14
H) Clock/Day Settings Clock set Y/N This section of the menu permits the user to set the time and day. Time setting Time set? Y/N Time 0:00 No next → Yes down ↓ Use ▲▼ To set value Day setting Day set? Y/N Day Monday No next → Yes down ↓ Use ▲▼ To set value Time format setting 12/24hrs set? Y/N 12/24hrs 12 hrs No = exit Yes down ↓ Use ▲▼ To set value J) Schedule hold Schedule hold Y/N This menu • • • • • This menu will only appear on stand-alone thermostat, e.i.
PAGE 15
Installer configuration parameter menu Configuration can be done through the network or locally at the thermostat. • To enter configuration, press and hold the middle button (Menu) for 8 seconds • Press the same middle button repetitively to scroll between all the available parameters • Use the up and down key to change the parameter to the desired value. • To acknowledge and save the new value, press the middle button again.
PAGE 16
Frost pr Frost protection enabled Default value = Off On heat pump models the system mode will be forced to EMERGENCY mode if frost protection is activated heat max Maximum heating setpoint limit Default value = 90 °F ( 32 °C ) cool min Minimum cooling setpoint limit Default value = 54 °F ( 12 °C ) Anticycle Minimum on/off operation time for stages Default value = 2 minutes Anti-short cycling can be set to 0 minutes for equipment that posses their own anti cycling timer.
PAGE 17
fan del Com Addr ToccTime cal RS cal OS H stage C stage Or HP stage H lock C lock Fan delay Default value = Off Fan delay extends fan operation by 60 seconds after the call for heating or cooling ends. Valid only for Auto fan mode. “On” fan mode will leave the fan always on.
PAGE 18
2/4event Number of events configuration Default value = 2 event aux cont Auxiliary contact configuration Default value = N.O.
PAGE 19
Comf/eco Comfort or economy mode Default value = Comfort re valve Reversing valve operation O/B Default value = O comp/aux Compressor/auxiliary interlock Default value = Off Sets the operation and interaction mode of the heat pump with the auxiliary heat. Comfort mode. In Heating mode. If the heat pump is not able to satisfy the heating setpoint, the auxiliary heat will be energized to satisfy the same heating setpoint. Economy mode. In Heating mode.
PAGE 20
Chngstpt min pos C mech Economizer Model only In Cooling mode. Changeover setpoint The outside air temperature value at which the Default value = 55 °F ( 13.0 °C ) cooling will be switched over from mechanical ( compressor ) to free cooling ( economizer ) 14 to 70 °F ( -10.0 to 21.0 °C ) Minimum position Outside air damper minimum position. Will be active only when fan is on ( G terminal ) Default value = 0% and the internal or remote scheduling is in Outside air occupied mode.
PAGE 21
PAN ID Personal Area Network Identification Default value = 0 Range is: 0 to 500 Wireless Model only Conditional parameter to Wireless models (VT76xxX1000W) This parameter will only appear when a wireless network adapter is present.
PAGE 22
Troubleshooting guide All models Symptom No display on the thermostat Possible Cause Absent or incorrect supply voltage Overloaded power transformer Corrective Action 1. Check power supply voltage between C & RC to be from 19-30 Vac 2.
PAGE 23
Troubleshooting guide Heatpump models Auxiliary heat does not operate Wrong mode selected Thermostat in Unoccupied mode Anticycle delay active Heating setpoint is satisfied High Balance point attained Heating lockout attained Wiring error Heat pump does not operate in heating mode Select emergency heat mode Select Occupied Hold in Schedule hold or Override to force the thermostat Occupied heating setpoint Wait, the anticycling period will end and the equipment will start Raise the Heating setpoint
PAGE 24
Specifications Thermostat power requirements: Operating conditions: Storage conditions: Sensor: Resolution: Control accuracy: Occupied and unoccupied setpoint range cooling: Occupied and unoccupied setpoint range heating: Room and outdoor air temperature range Proportional band for room temperature control: Digital inputs: Contact output rating: Economizer analog output rating: Economizer analog output accuracy: Wire gauge Dimensions: Approximate shipping weight: Agency Approvals all models: Agency Appro